Just when the Metro All-Stars felt they had a better-than-average chance of holding their own in what promises to be a war for rebounds Thursday, the U.S. All-Stars added four more highly-regarded prep stars to their team for the sixth annual Capital Classic basketball game at Capital Centre.

The local team began to look quite formidable when Harrisonburg's 7-foot-3 center Ralph Sampson and 6-4 leaper Quintin Daley were added as at-large players. With Sampson, 6-11 Thurl Bailey of Bladensburg, 6-8 Mike Tissaw of Robinson, 6-7 Mike Mulquin of Georgetown Prep and 6-7 Kevin Darmody of O'Connell, the area team looked tough inside.

The U.S. team had commitments from Lebanon, Pa., 7-1 All-America Sam Bowie, 6-11 Greg Kite of Madison High in Houston and 6-10 Tim Andree of Brother Rice of Birmingham, Mich.

Then they added 6-9 James Worthy, 6-8 Sid Green, 6-8 Clark Kellogg, 6-7 Derrick Hord and 6-7 Dominique Wilkins, and the U.S. All-Stars have the tallest squad in the history of the Classic.

Green is the best statistically, averaging 33 points and 25 rebounds pergame. Bowie is close behind with a 32-point and 19-rebound average while Kellogg comes in with a 27.5 scoring average to to with his 18 rebounds and seven assists per contest.

The big matchup will pit Bowie against the fluid, mobile Sampson, who averaged 30 points and 20 rebounds in leading Harrisonburg to a second consecutive Virginia AA championship.

The two seniors played on the same team thursday night in the McDonald's East-Well All-American classic in Charlotte, N.C.

Another interesting battle will see the De Matha back court of Dereck Whittenburg and Sidney Lowe go against Ricky Ross, a prolific scorer (31.6) and the slick Raymond McCoy, called by many the best high school poing guard in the nation.An excellent ballhandler and passer, McCoy scored 16 points per game while handling 8.5 assists.

Worthy is familiar to the De Matha players. De Matha defeated Worthy's team, Ashbrook of Gastonia, N.C., earlier this season, 46-43, but Worthy had 22 points and 15 rebounds.

A preliminary game between the District All-Stars and the suburban All-Stars will be played at 6 p.m.